Liquid pump



v.lune 17, 1930. B.,H. SCOTTv ETYAL 1,764,473

LIQUID PUMP Filed July 20, '1926 SAMUEL A? 5.5.," Y

June 17, 1930.

54H. SCOTT ET AL LIQUID PUMPA l Filed July 2o. 1926 v 2 Sheets-'Sheet 2.Z'N r/E/VTOQS; BERNARD cov-r SAMUEL f', oss.,

l & w

Patented vJune 17,

UNITED STATES .PATENT-j BERNARD n. s co'r'r, or GLENDALE, smeer. 1avRoss, orL'oNG' Banen,

ASSIGNORS T SCOTT-ROSS AND COMPANY, OF LOS ANGELES, CALIFORNIA, (30BPOBATION 0F DELAW Lieum rum- Applicaties mainly 2o,- 1926. 'serial n0.mamav i This invention relates to the'pumping of'- Oil from a well andit particularly relates' to equipmentforjoperating a fluid-actuatedpump. f The common form of pump used for pump- ,ing oil from awell-consists of a'reciprocat- ,ing pump which is situated near thelowerconnected to a walking beam by means of `which the' string of suckerrods is' recipro- 'cated and consequently the pump plunger is moved upandfdown.- A greater ercentage of the trouble with this form o pumpingequipment is caused bythe sucker rods, which by necessity are quitesmall in diameter .and are veryv iiexible. The .trouble resulting fromthe sucker rods rises mainly from two' sources, the 'sucker rodsuncouple by reason of a rotation 'of the pump plunger, and

the sucker rods break. by reason of the variable stresses which areplaced thereon. Fluid-operated pumps have been used to a certain extent,these being advantageousfin-, "fjfasmuchas they do not require the useof a "'g'stringofsuckerrods and consequently do L `not have the troubleswhich accompany them. Fluid-operatedpumps are characteriz'ed by thefactthat the pump mechanism at the lower 'end of the .wellis operated bya `fluid'under pressure which is pumped down into the well from thesurface of the ground. It is an object of this invention to provide anovel arrangement of parts in a well for conducting the power-Huid foroperating the pumpto the fluid-actuated pump,and for Otlier objects andadvantages will be made 5 0 manifest hereinafter;

.gas space 19. Placed inthe oilstrinII conducting the pumped fluid tothesurface ,'ch

' of thel oil string 15. -Ex-tending vide' a pump `for forcing thepower-fluid intol Referring to 'the drawings in which@ illustrate ourinvention,

Fig; 1 is a diagrammatic view showing 'the upper end of our invention. Y

Fig. 2 is a view showing-the lower end of our invention. A.

Fig. 3 is a plan view ofthe power-Huid pump of our invention.

Fig. 4 is a longitudinal'section of the pow- 4 er-fluid pump.

Fig. 5 is a section taken ontheline `55 ofFig.1.

Fig. 6. is a section taken on the line 6--6 Fig. 7 is a sectiontakenionthe line 7-7 .'R-e erringparticularly to Figs .11 and 2 of -thedrawings, the numeral 11 .represents a well in which a water stringindicated by the numeral 12 is installed. Accordin to com-A monpractice, in the oil producingmdustry, the-water string is installedbefore o ilfbear- -ing sands represented bythe numeral 13 have"- beenpenetrated, the lower end o f the water v string. 12 beingcemented at 14in order to eX- clude surface water from the well. Extend-l ing fromthe-surface of the ground through string 15. The oil' strin 15 projectsinto the extreme lower. end of t e wellthrough the Athe well inside thewater string 12 an oil oil-bearin sands13, the lower end of the oilstring 15 eing providedin the form of a.

screen pipe 16.; The upper end of the water string 12- is closed by ,ahead-plate -18, land anlannular gas space 19isfformed inthe water string12 around the oil string 15. A

pipe 20 is connected 'to the upper end of the' water'string12 forconducting` gas from the above the screen ipe 16 is a .packer 22W formsan outlet c amber 23in theupper end mto' the` tube 24 projecting througha coversplate25 24, which lower endiis situated near the low-l er end ofthe outlet chamber 'above the lower end of the reducer 28 is a pipe 29which extends through an opening in the packer 22 to the lower end ofthe well 11. The pipe 29 is not in communication with the pressurechamber 27 but is connected to the outlet chamber 23 by openings 30formed in the upper end'of the pipe 29 directly below' the reducer 28.Connected to the lower end of the pipe 29 is a fluidoperated pump V32which may be of any operable construction. The lower end of thefluid-operated pump -32 is provided with a customary form of gas anchor33. The pipe 29 provides an outlet passage 34 which is connected to theexhaust passage of the Huid-operated pump 32. An opening 36 is formedthrough the reducer 28, this opening communicating with the pressurechamber 27. Connected to the reducer 28 in communication with thepassage 36 is a pressure pipe 37. This pressure pipe 37 is quite smallin diameter, as shown, and extends downward through the outlet passage34, being connected to the fluid-operated pump 32. Thepressure pipe 37is connected to the fluid-operated pump 32 in such a manner that theuidunder pressure supplied thereb will operate the mechanism (not shownof the pump. Power-Huid is pumped into the pressure chamber 27 througha-power-iuidsupply line 39 which is connected to the ufpp'er end of theoil tube 24 by means of a' tting 40.

Referring to Figs. 1, 3, 4,4 and 5, the numeral 45 represents apressure-fluid pump which is situated in aderrick 46 of the well for thepurpose of forcing uid through the line 39 into the pressure chamber 27.The

pump 45 consists of a barrel 48 and a plunger 49. l The barrel 48consists of a barrel member 50 in-which a plunger osleeve 51 of theplungerl 49 is adapted to reciprocate. The Y lower end of the barrel 48isv provided with a standing ,valve 52 which is seated by means of a.spring 53, A pivot block 55 is connected to an inlet T 56 which ispositioned below the standing valve 52. The pivot block 55 is pivotallysupported on a shaft 57 which is supported by a .bracket 58. As shown inFigs. 1 and 5, the bracket 58 is situated adjacent to a lSamson post 59of the derrick 46. YThe'barrel 48 is so supported that it may bepivotally swung in a vertical plane. The plunger sleeve 51 has atraveling valve 59 connected to the upper end thereof which is-resilient-ly closed by a spring 60. Secured to the cage of thetravelingvailve 59 is a polish rod 61 of the plunger 49. This polish rod61 4extends through a stuing box 62 of thebarrel 48, which stufling boxis connected to. an outlet T 63 of the barrel 48. A bearing block 65 isconnected to the outer end of the polish l rod 61. This bearing .block65 is placed on a "pin 66 of a walking beam crank 67 of the derrick 46.The walking beam crank 67 is ordinary derrickA uipment and is secured toa shaft 68 which 1s rotated by means of a band wheel 69 secured thereto.A When the walking beam crank 67 is in operation, the plunger 49 isreciprocated in the barrel 48 but the outer end thereof is moved througha circular path. Forthis reason the barrel 48 must be supported so thatitwill swing in a vertical plane with the plunger 49 as the walking beamcrank 67 operates.

A fiuid supply tank 71 is supported near the derrick 46 as shown, thisfluid supply tank 71 being supplied with pumped iuid through a supplyline 72 which extends from the upper end of the outlet chamber 23 formedinthe upper end of the oil str' 15. Fluid is conducted from the'supply t71 to a suitable storage by means of a pipe 73. A flexible inlet line 74is connected to the lower part of the supplytank 71 and is connected asshown clearly in Fig. 5, to the inlet T 56 ofthe pump barrel 48. As thepumpl operates', Huid is drawn into the lowerend of the barrel throughtheflexible'inlet line 74. Connected to the outlet T 63 is a rigidoutlet pipe 76. Positioned adjacent Y to the bracket 58 (Fig. 5) is aswivel joint 77 having parts 78 and 79 which are pivoted together on thesame axis as the pivotal axis of the pumpbarrel 48. The member 78 of theswivel joint 77 is connected to the rigid, outlet pipe 76, and themember 79 is connected to the supply line 39 which is connected bymeans-ofthe fitting 40 to the upper end ofthe pressure chamber 27. Theswlvel joint 77 is absolutely necessary for the operation of the pumpbecause of the fact that the rigid 'outlet pipe 76 must swing .with the.pump barrel 48.- It would not be practical to make the outlet pipe 76from a flexible tube, since it must carry a Huid under .considerablepressure.

Duri the outward stroke of the' plunger 49, fluid which in this case isoil, situated in the barrel 48 above the traveling valve 59, is

forced therefrom through the outlet T 63 into the rigid outlet pipe 6.From thence it travels through the swivel joint 77, the power-fluidsuply line 39 andthe fitting 40 into this time the pressure chamber 27During1 h h t rou oil is drawn from the sup ly tank the iexible inlet 79into t e lower end of t e barrel 48 which is below the traveling valve59. During the inward or downward stroke of the plunger 49 the standingvalve 52, which was previouslyopen, immediately closes and the workin popened. O11 trapped in the space between the standing and working valves52 and 59 is forced into the upper portion of the barrel above thetraveling valve 59. It should be noted that since the polish rod 61extends through theupper part of the barrel 48 the valve 59, which -.wasclosed, is

ltr

area thereof is substantially one-half the area p of that portion of thebarrel below the traveling valve 59. For this reason the pump 45 win bedouble gering; that is, @ii M11 be A monconstruction and it is thereforenot-necessary to show the construction thereof. This pumped through therigid outlet pipe 76 during both strokes of the plunger. This is truebecause the volume of oil forced into the upper part of the barrel 48 istwice the volume of the upper part of the barrel; therefore, onehalfthis oil must flow from the upper part vof the barrel through the outletT 63 and into the pressure chamber 27 through the interconnecting parts.

The fluid or oil under pressure in the pressure chamber 27 flows throughthe passage 36 of the reducer 28 into the pressure pipe 37 by means ofwhich it is conducted to the fluidoperated pump 32. The fluid-operatedpump, as previously described, may be of any compower-fluid operates themechanism of the fluid-operated pump 32 and causes itvto pump oil fromthe lower end of the well 11 upward through the outlet passage 34.Thepowerfluid is preferably exhausted into the outlet passage 34 andconducted to the surface of the ground with the pumped fluid. The pumpedfluid passes upward through tlie outlet passage 34 and through tlieopenings 30 into the outlet chamber 23. The oil flows upward through theoutlet chamber 23 and passes into the pipe 7 2, by means ofwhich it isconveyed to the supply tank 71. The supply ta'nk 71 is kept full at alltimes so that af supply for the .pump will always be maintained. Afterthe supply tank 71 is filled, however, the additional fluid pumpedthereto will be conducted through the pipe 73 to a suitable storage orplace of use. Any gas which may tend to collect in the Well 11 passesupward around the oil string 15 into the gas space 19 formed at theupper end of the well, this gas being conducted from .the well throughthe pipe 20 rI hel arrangement of the piping in the Well 11 is animportant feature of the invention.

' The design is such that the construction is economical. y The oilstring 15 is always installed in a well immediately after the oilbearingsand has been penetrated. Whenvinstalling ther parts of our inventionthe fluidoperated pump 32 is connected to the lower end of the pipe29Mand is lowered into the l well, the small pressure-fluid pipe 37being attached thereto at this time.

at the upper end of the pipe 29 and may be expanded into tight contactwith the inner wall ofthe oil string 15 when the parts have arrived inproperposition. As the fluid- 'operated pump 32 is being lowered intothe well the reducer 28 and the oil tube 24`are connected to the upperend of the pipe 2?. The use of the `pressure-fluid pipe 28 is economicaland may extend a greater por-f tion of the length of the well. Thefeatures of using the reducer-and connecting the pipe 29 to the lowerend of the oil tube24 is im-l The packer- 22 is of common constructionand is placed portant to the invention, since it permits the use of acomparatively large outlet passage 34, which is desirable. The oil tube24 provides a pressure chamber 27 in the upper end of the well and thuseliminates the necessity for providing la pressure-fluid tank at thesurface of the ground.

The power-fluid pump 45 is a very im-.

It is veryportant part of the invention. simple inconstruction and isvery Vefficient in pumping the fluid under pressure to the pressurechamber 27. A very important part of this pump is that it may be drivenfrom the' Walkingbeam'crank which is a usual part of the derrickequipment. The pump in itself is ofsmall cost and does not require anyadditional driving means other than the walking beam crank 67 which ispresent at every Well.

An additional feature of the pump 45 is. that it is double acting. l l

We claim as our invention:

In a pump of the character described, the

combination of: a pump barrel; means for eoy In testimony whereof, wehave vhereunto set our hands at Los, Angeles, California, this 15th dayof July, 1926.

- BERNARD H. SCOTT.

SAMUEL E. ROSS.

